Attachment for stuffing-boxes.



E. P. GRISHAM.

ATTACHMENT FOR STUFFING BOXES.

APPLICATION FILED FEB. 3, 1912.

Patented NOV. 18, 1913.

KWVA WITNESSES 1N VE TOR mwjwdm M/Illorney nverse.

Annmarie.

EDWARD r. enisnnivr, or ST. LOUIS, MIssoonI.

7 ATTACHMENT FOR 'S TU'FFING-BOXES.

Specification of Letters Patent.

Application filed February 3, 1912. Serial No. 675,189.

PatentedNov. is, 1913.

To all whom z'tmay concern:

Be it known that I, EDWARD P. GnIsI-IAM,

a citizen of the United States, residing at- St. Louis, in the State of Missourhhave invented new and useful Improvements in Attachments for Stuffing-Boxes, of which the following is a specification.

My invention relates to attachments for stuiiing b xes and more specifically to an attachment adapted to engage the packing carried by a stuffing box, which attachment will allow for the contraction and expansion of the packing.

An object of my invention is to provide an attachment of the above character which is especially applicable to ice makingmachines and the like, wherein the packing becomes frozen at different times.

A further object of my invention is to provide an attachment of the above mentioned character which is simple in construction and canbe easily attached or removed from a stufling box.

With the foregoing and other objects in view my invention relates to such details of construction and in the arrangement and combination of parts as will be hereinafter fully described and specifically pointed out in the appended claims.

In'describing my invention in detail ref erence W111 be had to the accompanymgdrawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure l is a vertical sectional view of my invention as in place. Fig. 2 is a cross sectional View of a detail.

In. the accompanying drawings which fully illustrate the preferred form of my invention the numeral 1 designates the head of an ordinary stuffing box upon which is formed the annular collar 2, the said collar being adapted to receive a plurality ofpacking rings 3. A piston rodl operates through the head of the stuiiing box 1 and through the rings 3 as shown. Connected to the colla r 2 are the rods 5 which support at their outer ends a plate 6, the piston rod 1 operating through the said plate.

Mounted on rods 5 between the plate 6 and a second plate 8 are a pair of springs 7. Between the springs 7 and on opposite sides of the piston rod 4 are additional springs 12 carried by studs 13, said studs being threaded into the outer face of the plate 8 and projecting outwardly through apertures formed in the plate 6. Nuts or heads 14:

are carried, preferably adjustably, upon the outer ends of the studs 13 and engage the outer: face of the plate 6 upon the limit of the separating movement of the plates. The

plates 6 and 8 are limited in their expanding movement to prevent forcing' the packing, when it has become worn and broken up, inwardly through the stuffing box 1; The plate 8 thus serves as a guard plate admit ting of the automatic adjustment of the packingand at the same time preventing the forcing of the worn packing out of the box.

For the purpose of yieldingly engaging the packing rings 3 a sleeve 9 is provided which sleeve is provided with an annular flange 10 which is slidably mounted upon the rods 5 as shown. The inner ends of the sleeve 9 are formed as shown at 11 whereby they may more readily engage the packing rings 3 and force the same into engagement with the rod 4:. It will be readily seen that when the rings become frozen they contract and as they do so the sleeve will be pushed farther into the collar 2 through the medium of the coiled springs 7. If, on the other hand, the rings become very hot they expand, thereby forcing the sleeve outwardly and contracting the springs 7.

I desire to lay the greatest of stress upon the simplicity of my device and that it can be easily attached to the different stufling boxes now in use. i

It is to be understood that I may make slight changes in the construction of my invention without departing from the spirit thereof, provided, however, said changes fall within the scope of the subjoined claims.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is 1. In packing and in combination, a stuffing box packing in said box, a gland projecting in said box and against said packing, adjustable means yieldingly pressing said gland against said packing, and adjustable guarding means associated with said first means for limiting the pressing movement of said first means. i

2. In packing and in combination, a stuffing box adapted to receive packing, a gland in said box, yielding means bearing against said gland whereby to compress said packing, and limiting means connected to said yielding means whereby to limit the compression of said packing.

' 3. An attachment for stuffing boXes com- 7 prising guide rods for securement to a stufigland and said springs, studs projectinglf rom said guard plate and engaging slidably through said .first golate, and heads adijustably mounted upon the outer ends of said studs and adapted for engagement against the outer face of said plate to limit the expansion of said springs.

4. A11 attachment for stuifing boxes comprising a pair of rods adapted for securement to a stufling box, a pair of plates slidably mounted on said rods between said plates for yieldably holding the same apart, adjustable nuts carried on the outer ends of the rods and adapted to bear against the outer one of said plates whereby to yieldab'ly hold the inner plate against the gland of said stufiing box, and means car ried by said plates for limiting the separat ing movement of the same.

EDWARD P. GRESHAM.

Witnesses I FRAN CLARK, EDWARD .H. fGUNNINGI-IAM.

Copies of this patent may be obtained for v five cents each, by addressing. the "Gommis sionerof .Iatents, 7

Washington, D. 0. 

